土壤中镉、铅对百日草种子萌发及生长的影响

Effects of Cd and Pb on the Germination and Growth of Zinnia elegans Jacq.

研究了土壤中镉、铅对百日草种子萌发及对植株生长的影响。结果表明:随着土壤中含Cd、Pb浓度的增大,对种子的萌发均会起到抑制作用,同时随着重金属浓度的增加,植株体内的叶绿素含量、丙二醛含量也有明显的下降趋势。在Cd浓度为100 mg/kg时,百日草体内Cd的含量最高;在Pb浓度为1 000 mg/kg时,植株吸收Pb的含量最高。

The effect of Cd and Pb on the germination and growth of Z..elegans Jacq.was studied in the paper.The results showed that the germination of seeds was inhabited with the increasing of Cd and Pb in the soil.The chlorophyll content and the content of MDA were decreased obviously with the increasing of concentration of Cd and Pb.The concentration of Cd in the plant reached a maximum when the concentration of Cd in soil was 100mg/kg.And the concentration of Pb absorbed by the plant reached a maximum when the concentration of Pb in soil was 1000mg/kg.